Automatic stop for sound-reproducing machines



Juiy 1 192% 1,499,666

J. J. KENNEDY AUTOMATIC STOP FOR SOUND REPRODUCING MACHINES Filed Nov. 27, 1922 2 Sheets-Sheet 1 J6kn J liennecgy.

6 6 9 9 11 Y D E N N E K i Jul 1 1924.

AUTOMATIC STOP FOR SOUND REPHODUCING MACHINES File 27, 1922 2 Sheets-Sheet 2 IN VLNTOR rE/zn J A TTORNE 195 Patented July 1, 1924.

N H r r JOHN J. KENNEDY, or onroaeo, rLnrNors.

Application filed November 27, 1922. Serial No. 603,415.

T 0 all whom it may concern:

Be it known that 1, JOHN J. KENNEDY, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Automatic Stops for Sound-Reproducing Machines, of which the following is aspecification.

My invention relates to improvements in automatic stops for sound reproducing machines and has for one object to provide a stop which goes into operation when the rec 0rd has been completed without the necessity of the operator setting the stop in any way. i Another object is to provide a stop which may be used in connection with any type offiat disc machine or cylindrical machine. Another object is to provide a stop which with slight change may be used for mechanical stoppage or for electric stoppage and control. Another object is to provide a stop which can be easily applied either to a sound reproducing machine while it is being built or after its completion.

My invention is illustrated more or less diagrammatically in the accompanying drawings wherein Fig. 1 is a diagrammatic plan view showing the record and record plate in dotted lines.

Fig. 2 is a section in part elevation of the device shown in Fig. 1-.

Fig. 3 is a detail of the friction j'oint connection for the stop arm. a

Fig. 4 is a detail section through a modified form of stop disc. Y

Like parts are indicated by like characters inthe drawings.

A is the upper wall ofthe case of any ordinary sound producing or talking machine. A' is a sleeve mounted on this wall having rotatable therein the sound A adapted to carry any ordinary type" of sound box not here shown. A is the re cord carrying post upon which is mounted the record supporting plate A adapted to rotate with the post. A is the disc record adapted to rest on and rotate with the plate A*.

13' is a controland stop disc mounted for rotation on the pin B projecting upwardly from the wall A, This disc is in frictional engagement with the post A and driven thereby.- The post and control plate might be geared together if that were desirable or the post A might carry' a friction wheel in engagement with a friction wheel or sleeve of any desired diameter as shown at B? tovary the speed ratio'between the control disc and the post and to insure a satisfactory drive. The plate B has arranged inside its periphery an upwardly extending I wall B terminating at an entrance port" 13*. B B are a series of apertures in the surface of the disc or plate B arranged in a spiral or helical line. a

C is a bell crank lever pivoted on the post C in the bracket C Pi-voted on the post C and held in frictional engagement with the lever C by the spring C is a stop arm C which arm terminates in a downwardly extending nose C adapted when the parts are in the positionshown in Figure 1 to travel along the outer periphery of the plate B outside of the wall B .(1 is a control pin projecting downwardly from the arm A in line with the bell crank lever C, this pin being located betweenthe arms of the bell crank lever.- The arrangement issuch that, as the sound arm rotates in a clockwise direction resultant upon the centripetal movement of the needle or stylus along the reproducing disc, the pin C will finally come into engagement with the curved surface G on the bell crank lever C and tend to rotate it in a counter-clockwise direction. This tends to move the stop arm C inwardly against the wall B and it will be urged inwardly by the frictional ei'igagement between it and the bell crank lever without movement inward until the rotation of the stop disc brings the port 13* around to permit inward movement of the stop lever and nose C. After this as the stylus moves inwardly and the sound arm rotates, the nose C will describe a helical or spiral path conforming generally to the spirallocation of the stop apertures B and there will be no engagement between the nose C and these apertures. However, as soon as the stylus reaches the end of its excu-rsionin the innermost groove in the record disc it will take up a circular instead of a spiral path and the spiral movement of the end of the stop lever across the face of the stop disc will cease and become a circular movement. This-will cause the line of travel of the end of the stoplevernow circular, to intercept the helical line upon Cit mediately bring the stop disc to rest, holding it against further rotation. If there is a frictional engagement between the stop disc and the record carrying post, this will check and finally stop the movement. If there is a geared relation, this will immediately stop movement.

When it is desired to put the machine back into operation the outward movement of the sound arm will cause the pin C to engage the curved end C of the bell crank lever and throw it back into some such position as is shown in Figure 1. The first effect this will have on the stop arm C is to rotate the bell crank lever with respect to it until the lug (1 engages the stop arm when a positive driving connection will be established and the stop arm Will be moved outwardly. This is possible because the nose C has an outwardly disposed inclined surface which rides up out of whichever stop aperture it is caught in and over the wall B back to the position shown in Figure 1.

In the modified form shown in Figure 4: the stop arm C has a smooth downwardly extending contact member D riding on an insulating disc D having a wall D similar to thewall B. D D are contact plates flush with the upper surface of the disc and all of them are connected to a conducting plate D below. An electric circuit may be closed through any one of these contact members and the contact member on the stop arm and this electric circuit when closed may be adapted to throw a switch or apply a brake in any usual manner, for instance by energizing a solenoid, D.

I have shown this invention as applied to a well known type of disc sound reproducing machine, but I wish it to be understood that I do not limit myself to the specific application of my invention herein disclosed since it might with equal facility be applied to other types and devices. Furthermore, I do not wish to limit myself to the specific form herein shown, and many changes might be made in the size, number, shape, relation, and disposition of parts without departing from the spirit of my invention. Therefore, while in my claims I have talked about the sound reproducing machine, it is to be understood that I do not intend these claims to be limited in scope to any particular type of sound reproducing machine or, in fact, to any particular type of machine, but the words sound reproducing are to be considered as merely exemplifying the type of mechanism wherein this invention can be used.

I claim:

1. In a sound reproducing machine comprising a record disc and means for rotating it, a stylus mounted for movement thereacross, a stop disc mounted for rotation in unison with the record disc, a plurality of stop members mounted thereupon, a stop finger, and means responsive to the movement of the stylus for moving it across said stop disc in a path normally out of contact with said stop elements, and means operative upon cessation of the movement of the stylus for causing the path of the stop finger to intersect one of said stop members.

2. A sound reproducing machine comprising a record disc and means for rotat ing it, a stylus adapted to travel across said disc and means associated with the stylus for stopping the operation of the machine when the stylus terminates its excursion across the record disc, comprising a stop disc, a plurality of stops thereon, a stop finger adapted to travel across stop disc, and means for causing it to contact one of said stops in response to the cessation of the travel of the stylus across the record disc.

3. In a sound reproducing machine having a sound reproducing disc, a stylus adapted to move radially across said disc, and means associated with the stylus for stopping the rotation of the disc when the stylus ceases its radial movement, comprising a stop element frictionally driven from said disc and a stop arm adapted to move thereacross in response to the movement of said stylus.

4. In a sound reproducing machine having a sound reproducing disc, a stylus adapted to move radiallyacross said disc, and means associated with the stylus for stopping the rotation of the disc when the stylus ceases its radial movement, comprising a stop carrying disc frictionally driven from said sound reproducing disc, a stop arm adapted to move across said stop carrying disc in response tothe movement of said stylus, and means for causing the path of said stop arm across said disc to intersect said stop in response to the cessation of movement of said stylus.

5. A sound reproducing machine co1nprising a record disc and means for rotating it, a stylus mounted for movement there across, a series of helically arranged stop members mounted for rotation in unison with thedisc, 2. stop finger associated but normally out of contact With the stop members, and means responsive to the movement of the stylus for constraining the stop finger to a path generally parallel to the helix located by the stop members and means op erative upon the cessation of the stylus movement for causing the path of the stop finger to intersect the helix.

6. A sound reproducing machine comprising a record disc and means for rotating it, a stylus mounted for movement thcreacross, a series of helically arranged stop members mounted for rotation in unison m mes v with the disc, a stop finger associated but normally out of contact with the stop members, and means responsive to the movement of the stylus for constraining the stop finger to a path generally parallel to the helix located by the stop members and means operative upon the cessation of the stylus movement for causing the path of the stop finger to intersect the helix, said stop members arranged to go into operation only toward the end of the excursion of the stylus.

7 A sound reproducing machine comprising a record disc and means for rotating it, a stylus mounted for movement tliereacross, a series of helically arranged stop members moimted for rotation in unison with the disc, a stop finger associated but normally out of contact with the stop members, and

means responsive to the movement of the stylus for constraining the stop finger to a path generally parallel to the helix located by the stop members and means operative upon the cessation of the stylus movement for causing the path of the stop finger to interse ct the helix, said stop members arranged to go into operation only toward the end of the excursion of the stylus, and means associated with the stylus for returning the stop mechanism to its inoperatve position upon the return movement of the stylus.

8. In a sound reproducing machine, a stop disc rotatably mounted,'a series of helically arranged stop members thereon, a stop finger associated therewith and means for guiding said stop finger along a path generally parallel with said helix during sound reproduction and for causing the path of the stopfinger to intersect the helix and engage one of the stop members upon the termination of sound reproduction.

9. In a sound reproducing machine, a stop disc rotatably mounted, a series of helically arranged stop members thereon, a stop finger associated therewith and means for guiding said stop finger into a path generally parallel with said helix during sound reproduction and for causing the path of the stop finger to intersect the helix and engage one of the stop members upon the termination of sound reproduction, a wall on the stop disc surrounding the stop members and adapted to hold the stop finger away from the vicinity of the stop members until the sound reproducing apparatus approaches the end of its movement.

10. In a sound reproducing machine, a stop disc rotatably mounted, a series of helically arranged stop members thereon, a stop finger associated therewith and means for guiding said stop finger along a path generally parallel with said helix during sound reproduction and for causing the path of the stop finger to intersect the helix and engage one of the stop members upon the termination of sound reproduction, a wall surrounding the stop members apertured to permit entrance of the stop finger only at a point out of line with the terminus of the helix.

11. In a sound reproducing machine, a stop disc rotatably mounted, a series of heli cally arranged stop members thereon, a stop finger associated therewith and means for guiding said stop finger along a path generally parallel with said helix during sound reproduction and for causing the path of the stop finger to intersect the helix and engage one of the stop members upon thetermina- I tion of sound reproduction, the stop members comprising apertures in a plate adapted to be engaged by the finger to bring the stop plate to rest and a driving connection between'the stop plate and the sound reproducing means by which the movement of the plate stops the sound reproducing means.

12. In a sound reproducing machine, a stop disc rotatably mounted, a series of helically arranged stop members thereon, a stop finger associated therewith andv means for guiding said stop finger into a path generally parallel with said helix during sound reproduction and for causing the path. of

the stop finger to intersect the helix and engage one of the stop members upon the termination ofsound reproduction, a plate being electrically insulated, the stop members comprising a contact point projecting therefor, and an electric circuit including the contact points and the stop finger adaptedv to be closed to stop movement upon the engagement of the stop finger with one of the stop ins.

13. A stop for a sound reproducing machine comprising a stop plate and means for rotating it resultant uponthe movement of the machine, stop elements helically arranged upon the plate, an apertured wall adjacent the periphery of the plate,-a stop lever adapted normally to travel on the face of the plate outside the apertured wall to the members responsive to the operation of the sound reproducing mechanism for yieldingly thrusting the stop finger inwardly against the wall to cause it to pass through the aperture therein as the wall rotates and describe a helical path parallel with the helix. located by the stop member and means for causing the path to intersect the helix upon cessation of the sound reproduction.

14. A sound reproducing machine comprising a record disc and means for rotat ing it, a stylus, adapted to move radially thereacross during operation, a stop disc moving in unison with the record disc and a stop finger adapted to ride on the face thereof and means associated with the stylus for moving it radially thereacross, stop elements helically disposed upon the face of the stop disc, means for preventing initial movement of the stop element across the disc except at a point removed from the terminus of the helical line passing through the stop elements, the relation between the rotary movement of the stop disc and the radial movement of the stop member being such as to cause the stop member to describe a helical path which does not intersect the helical line of the stop elements.

15. A sound reproducing machine comprising a record disc and means for rotating it, a stylus arm adapted to swing radially across the face of the disc during operation, a stop disc driven in unison with the record disc, a stop arm adapted to ride on the face thereof and means associated with the stylus arm for swinging it radially. thereacross, stop elements on the face of the stop disc arranged along a helical line on the disc, means for preventing the swinging movement of the stop arm across the face of the disc except at a point removed from the terminus of such helical line, the relation between the rotary movement of the stop disc and the swinging movement of the stop arm being such that while the stylus arm is swinging the stop arm describes a helical path which d not intersect the helical line along which the stop elements are located.

16. Sound reproducing machine comprising a rotating record disc, a stylus and stylus arm adapted to swing radially across the face of the disc, a stop disc driven by the record disc, a pin downwardly projecting from the stylus arm and bell crank lever in the path of said pin, a stop arm associated with the bell crank lever and adapted to be frictionally rotated thereby, an annular wall adjacent said disc ported at one point, a series of helically arranged stop members on the face of the stop disc, the helix being such that when the stop lever is rotated to travel across the face of the stop disc by the movement of the pin on the stylus arm the stop lever describes a helical path upon the stop disc which does not intersect the helical member along which the stop members are arranged, the stop member being adapted to intersect the helix when the stylus arm reaches the limit of its excursion and radial movement of the stop member ceases.

17. In a sound reproducing machine, a stop disc rotatively mounted thereupon, the surface of said disc being provided with a plurality of stop apertures, a stop finger associated with said disc, means for guiding said finger across said disc out of contact with said stop apertures and means for causing the path of said finger to penetrate one of said stop apertures upon the termination of sound reproduction.

18. In a sound reproducing machine, a stop disc rotatively mounted, the upper surface of said disc being provided with a series of helically arranged stop indentations. a stop finger associated with said stop disc and means for guiding it along a path generally parallel with said helix during sound reproduction and for causing the path of the said finger to intersect the helix and engage one of the stop apertures upon. the termination of sound reproduction.

Signed at Chicago, county of Cook and State of Illinois, this 23rd day of November, 1922.

JOHN J. KENNEDY. 

